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Abstract #4112

Dynamic Contrast Enhanced-MRI of the Liver using Automated Navigator Tracker and Prospective Navigator Correction

Takao Goto 1 , Shiro Ozaki 2 , Yuji Iwadate 3 , Kunihiro Miyoshi 1 , Koji Uchida 4 , Hajime Kitagaki 4 , and Hiroyuki Kabasawa 3

1 MR Engineering, GE Healthcare, Hino-shi, Tokyo, Japan, 2 Shimane University Hospital, Izumo-shi, Shimane, Japan, 3 Global MR Applications and Workflow, GE Healthcare, Hino-shi, Tokyo, Japan, 4 Department of Radiology, Shimane University Faculty of Medicine, Izumo-shi, Shimane, Japan

In our previous study, we proposed a method for automated navigator tracker (ANAV) positioning to improve operator workflow. In order to progress this work further, we applied an ANAV to a prospective navigator correction. The T1 weighted fat-saturated 3D fast SPGR sequence is used for the DCE-MRI, which acquired pre-contrast, arterial, portal, equilibrium and two delayed phase images with the breath-holding method. We set the top position of the liver as a reference in the pre-contrast images. The navigator tracked this position in successive phase images. Forty patients were tested, producing satisfactory results and helping to identify a limitation.

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